Ever wanted to see inside the body of a crocodile in the highest of resolutions? Now you can, thanks to Ohio University Professor of Anatomy and Paleontology Larry Witmer. To understand dinosaur anatomy, he's turned to birds and crocodilians, their closest living relatives. »4/05/14 11:01am 4/05/14 11:01am

320 million years ago, mammals and reptiles reached an evolutionary parting of the ways. We've now sequenced a lizard genome for the first time ever, and it's vastly different from our own...but in a few crucial ways, it's shockingly similar. »8/31/11 4:26pm 8/31/11 4:26pm

This is Dimetrodon, the world's top predator about 270 million years ago. Living before the dawn of the dinosaurs, this striking creature was actual a distant ancestor of mammals like us. Now we've discovered the most complete Dimetrodon skeleton ever. »12/06/10 7:04pm 12/06/10 7:04pm

The complex evolutionary relationships between birds and dinosaurs has only really started to become clear in the last 15 years. But one brave thinker in 1897 knew the real truth: it was all down to birds and reptiles doing it. »12/03/10 4:00pm 12/03/10 4:00pm